磁化水钢纤维混凝土压拉性能试验与分析

为提高钢纤维混凝土的压拉性能,将磁化水技术应用到钢纤维混凝土中。对磁化水水流速度与钢纤维体积率进行正交试验,并制作标准试块进行压拉强度试验,研究磁化水对钢纤维混凝土压拉性能的影响。试验结果表明:磁化水能有效提高钢纤维混凝土的压拉强度,当磁场强度为285 mT,水流速度为2.1 m/s,钢纤维体积率为1.8%时,磁化水钢纤维混凝土的压拉强度与素混凝土相比,28天立方体抗压强度提高23.71%,劈裂抗拉强度提高43.63%。对磁化水增强钢纤维混凝土压拉性能机理进行分析可知,磁化水能通过提高混凝土压拉强度和改善钢纤维与混凝土间的界面粘结力,增强钢纤维混凝土的压拉性能。

Experiment and Analysis on Performance of Compression and Tension of Steel Fiber Concrete with Magnetic Water

In order to improve the compressive and tensile strength of concrete, the magnetized water technology is applied to the steel fiber reinforced concrete. An orthogonal test was carried out on flow velocity of magnetic water and fraction of steel fiber by volume, and the standard cube specimens were prepared for the compressive and splitting tensile strength test. The test studies the impact of magnetized water on compressive and tensile properties of steel fiber reinforced concrete. The results show that magnetized water can give great improvement to the compressive strength and splitting tensile strength of steel fiber reinforced concrete. When the magnetic intensity is 285 mT, the water flow velocity is 2.1 m/s and the steel fiber volume fraction is 1.8%, compared with plain concrete, the 28 day compressive strength of magnetized steel fiber reinforced concrete cubes can be increased by 23.71% and the splitting tensile strength can be increased by 43.63%. Analysis on the mechanism of steel fiber concrete compressive and tensile properties reinforced by magnetized water shows that the magnetized water can improve compressive and tensile strength of concrete and the interface adhesion strength between steel fiber and concrete, thus increases compressive and tensile properties of steel fiber concrete.